18354645 has 24 divisors (see below), whose sum is σ = 33687576. Its totient is φ = 9212928.

The previous prime is 18354641. The next prime is 18354647. The reversal of 18354645 is 54645381.

It is a happy number.

18354645 is a `hidden beast` number, since 1 + 8 + 3 + 5 + 4 + 645 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 181476 + 18173169 = 426^2 + 4263^2 .

It is not a de Polignac number, because 18354645 - 2² = 18354641 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18354641) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 11232 + ... + 12761.

It is an arithmetic number, because the mean of its divisors is an integer number (1403649).

Almost surely, 2^18354645 is an apocalyptic number.

18354645 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

18354645 is a deficient number, since it is larger than the sum of its proper divisors (15332931).

18354645 is a wasteful number, since it uses less digits than its factorization.

18354645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24021 (or 24018 counting only the distinct ones).

The product of its digits is 57600, while the sum is 36.

The square root of 18354645 is about 4284.2321365678. The cubic root of 18354645 is about 263.7841296624.

The spelling of 18354645 in words is "eighteen million, three hundred fifty-four thousand, six hundred forty-five".